<template>
  <!-- 封装商品组件 -->
     <view class="goods-item">
          <!-- 左侧的盒子 -->
          <view class="goods-item-left">
            <radio :checked="goods.goods_state" color="#C00000" v-if="showRadio" @click="radioClickHandler"></radio>
            <image :src="goods.goods_small_logo || defaultPic" class="goods-pic"></image>
          </view>
          
          <!-- 右侧的盒子 -->
          <view class="goods-item-right">
            <!-- 商品的名字 -->
            <view class="goods-name">{{goods.goods_name}}</view>
            <view class="goods-info-box">
              <view class="goods-price">￥{{goods.goods_price | tofixed}}</view>
              <uni-number-box :min="1" :value="goods.goods_count" v-if="showNum" @change="numChangeHandler"></uni-number-box>
            </view>
          </view>
        </view>
</template>

<script>
  export default {
    name:"my-goods",
    props: {
      goods:{
        type:Object,
        default:{}
      },
      // 是否展示图片左侧的 radio
      showRadio: {
        type:Boolean,
        // 默认情况下,不会展示radio组件
        default:false
      },
      // 是否展示价格右侧的 NumberBox 组件
      showNum: {
        type:Boolean,
        default:false
      }
    },
    data() {
      return {
        // 默认的空图片
        defaultPic:'https://img3.doubanio.com/f/movie/8dd0c794499fe925ae2ae89ee30cd225750457b4/pics/movie/celebrity-default-medium.png'
      };
    },
    
    // 使用过滤器 把数字处理为带两位小数点的数字
    filters: {
      tofixed(num) {
       return Number(num).toFixed(2)
      }
    },
    methods: {
      // 这是 radio 组件的点击事件处理函数
      radioClickHandler() {
        this.$emit('radio-change',{
          goods_id:this.goods.goods_id,
          goods_state:!this.goods.goods_state
        })
      },
      // 监听到了NumberBox组件数量变化的事件
      numChangeHandler(val) {
        // console.log(val)
        // 通过 this.$emit() 触发外界通过 @ 绑定的 num-change 事件
        this.$emit('num-change', {
          goods_id:this.goods.goods_id,
          // 商品的最新数量
          goods_count: +val
        })
      }
    }
  }
</script>

<style lang="scss">
.goods-item {
  width: 750rpx;
  box-sizing: border-box;
  display: flex;
  padding: 10px 5px;
  border-bottom: 1px solid #F0F0F0;
  
  .goods-item-left {
    margin-right: 5px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    
    .goods-pic {
      width: 100px;
      height: 100px;
      display: block;
    }
  }
  
  .goods-item-right {
    display: flex;
    flex: 1;
    flex-direction: column;
    justify-content: space-between;
    
    .goods-name {
      font-size: 13px;
    }
    
    .goods-info-box {
      display: flex;
      justify-content: space-between;
      align-items: center;
      
      .goods-price {
        color: #C00000;
        font-size: 16px;
      }
    }
  }
}
</style>
